The message suggests that you are trying to use cache directory
from nginx 1.11.6+ with use_temp_path=off. There are temporary
files left in the cache directories, and the older version doesn't
recognize them and complains.

I am using nginx running with version 1.10.2
Also could you please suggest what is the permanent solution for this also
what does exactly use_temp_path does?
Should we keep it explicitly on , we have not set this directive in our
nginx.conf.